Ag News: Mexican trade delegates were in Lincoln yesterday. We get a view on the discussions ...Brazil approves the Dow/Dupont merger .. Report on the successful "Beef Experience Tour" ... Brian Magnusson of Lindsay Mfg touts a new irrigation management tool ... Ag Secretary Sonny Perdue discusses restructuring USDA with Jesse Harding ... Lynn Meyer on upcoming Generational Transition meeting in Belvedere, NE